C111123313331323113313331333133313121111133112111133132333133312321   >>    C11112331333132311331333133313331312111113311211113313233313331232   <<    C111123313331323113313331333133313121111133112111133132333133312323   >>      C111123313331323113313331333133313121111133112111133132333133312322   >>